InvoiceShelf up to 2.1.x Invoice PDF Generation Invoice Notes server-side request forgery

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in InvoiceShelf up to 2.1.x. Affected is an unknown function of the component Invoice PDF Generation Module. Performing a manipulation of the argument Invoice Notes results in server-side request forgery. This vulnerability is reported as CVE-2026-34367. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in InvoiceShelf up to 2.1.x. It has been classified as critical. This affects some unknown processing of the component Invoice PDF Generation Module. The manipulation of the argument Invoice Notes with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and create professional invoices and estimates. Prior to version 2.2.0, a Server-Side Request Forgery (SSRF) vulnerability exists in the Invoice PDF generation module. User-supplied HTML in the invoice Notes field is passed unsanitised to the Dompdf rendering library, which will fetch any remote resources referenced in the markup. This can be triggered via the PDF preview and email delivery endpoints. This issue has been patched in version 2.2.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-34367 since 03/27/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are required for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 2.2.0 eliminates this vulnerability. The upgrade is hosted for download at github.com.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.7
NVD Vector: 🔒

CNA Base Score: 7.6
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: InvoiceShelf 2.2.0

Timelineinfo

03/27/2026 CVE reserved
04/01/2026 +4 days Advisory disclosed
04/01/2026 +0 days VulDB entry created
07/25/2026 +115 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-q9wx-ggwq-mcgh
Status: Confirmed

CVE: CVE-2026-34367 (🔒)
GCVE (CVE): GCVE-0-2026-34367
GCVE (VulDB): GCVE-100-354507

Entryinfo

Created: 04/01/2026 04:00
Updated: 07/25/2026 23:50
Changes: 04/01/2026 04:00 (66), 07/25/2026 23:50 (13)
Complete: 🔍
Cache ID: 216::103

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